If an object is moving in a straight line and its velocity is increasing, its acceleration is positive. This means the acceleration is in the same direction as the velocity, causing the object to speed up over time. Acceleration is defined as the rate of change of velocity with respect to time. When velocity increases, the change in velocity is positive, hence the acceleration is positive as well.
Explanation
- Acceleration is a vector quantity that indicates how quickly the velocity of an object changes.
- Positive acceleration means the velocity magnitude is increasing.
- In straight-line motion, when velocity increases, acceleration points in the direction of motion.
- This is consistent with fundamental physics equations of motion, such as v=u+atv=u+atv=u+at, where positive acceleration results in higher velocity over time.
Thus, the acceleration of such an object is positive.
